334 lines
8.2 KiB
C
334 lines
8.2 KiB
C
/* $NetBSD: citrus_big5.c,v 1.5 2002/03/28 10:53:48 yamt Exp $ */
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/*-
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* Copyright (c)2002 Citrus Project,
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*-
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* Copyright (c) 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Paul Borman at Krystal Technologies.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: citrus_big5.c,v 1.5 2002/03/28 10:53:48 yamt Exp $");
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#endif /* LIBC_SCCS and not lint */
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#include <assert.h>
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#include <errno.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <stddef.h>
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#include <locale.h>
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#include <wchar.h>
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#include <sys/types.h>
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#include <limits.h>
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#include "citrus_module.h"
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#include "citrus_ctype.h"
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#include "citrus_big5.h"
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/* ----------------------------------------------------------------------
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* private stuffs used by templates
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*/
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typedef struct {
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char ch[2];
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int chlen;
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} _BIG5State;
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typedef struct {
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int dummy;
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} _BIG5EncodingInfo;
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typedef struct {
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_BIG5EncodingInfo ei;
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struct {
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/* for future multi-locale facility */
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_BIG5State s_mblen;
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_BIG5State s_mbrlen;
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_BIG5State s_mbrtowc;
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_BIG5State s_mbtowc;
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_BIG5State s_mbsrtowcs;
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_BIG5State s_wcrtomb;
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_BIG5State s_wcsrtombs;
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_BIG5State s_wctomb;
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} states;
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} _BIG5CTypeInfo;
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#define _CEI_TO_EI(_cei_) (&(_cei_)->ei)
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#define _CEI_TO_STATE(_cei_, _func_) (_cei_)->states.s_##_func_
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#define _FUNCNAME(m) _citrus_BIG5_##m
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#define _ENCODING_INFO _BIG5EncodingInfo
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#define _CTYPE_INFO _BIG5CTypeInfo
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#define _ENCODING_STATE _BIG5State
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#define _ENCODING_MB_CUR_MAX(_ei_) 2
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#define _ENCODING_IS_STATE_DEPENDENT 0
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#define _STATE_NEEDS_EXPLICIT_INIT(_ps_) 0
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static __inline void
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/*ARGSUSED*/
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_citrus_BIG5_init_state(_BIG5EncodingInfo * __restrict ei,
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_BIG5State * __restrict s)
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{
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memset(s, 0, sizeof(*s));
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}
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static __inline void
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/*ARGSUSED*/
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_citrus_BIG5_pack_state(_BIG5EncodingInfo * __restrict ei,
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void * __restrict pspriv,
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const _BIG5State * __restrict s)
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{
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memcpy(pspriv, (const void *)s, sizeof(*s));
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}
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static __inline void
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/*ARGSUSED*/
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_citrus_BIG5_unpack_state(_BIG5EncodingInfo * __restrict ei,
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_BIG5State * __restrict s,
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const void * __restrict pspriv)
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{
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memcpy((void *)s, pspriv, sizeof(*s));
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}
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static __inline int
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_citrus_BIG5_check(u_int c)
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{
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c &= 0xff;
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return ((c >= 0xa1 && c <= 0xfe) ? 2 : 1);
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}
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static __inline int
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_citrus_BIG5_check2(u_int c)
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{
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c &= 0xff;
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if ((c >= 0x40 && c <= 0x7f) || (c >= 0xa1 && c <= 0xfe))
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return 1;
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else
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return 0;
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}
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static int
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/*ARGSUSED*/
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_citrus_BIG5_stdencoding_init(_BIG5EncodingInfo * __restrict ei,
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const void * __restrict var, size_t lenvar)
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{
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_DIAGASSERT(ei != NULL);
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memset((void *)ei, 0, sizeof(*ei));
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return (0);
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}
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static void
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/*ARGSUSED*/
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_citrus_BIG5_stdencoding_uninit(_BIG5EncodingInfo *ei)
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{
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}
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static int
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/*ARGSUSED*/
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_citrus_BIG5_mbrtowc_priv(_BIG5EncodingInfo * __restrict ei,
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wchar_t * __restrict pwc,
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const char ** __restrict s, size_t n,
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_BIG5State * __restrict psenc,
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size_t * __restrict nresult)
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{
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wchar_t wchar;
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int c;
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int chlenbak;
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const char *s0;
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_DIAGASSERT(nresult != 0);
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_DIAGASSERT(ei != NULL);
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_DIAGASSERT(psenc != NULL);
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_DIAGASSERT(s != NULL && *s != NULL);
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s0 = *s;
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if (s0 == NULL) {
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_citrus_BIG5_init_state(ei, psenc);
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*nresult = 0;
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return (0);
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}
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chlenbak = psenc->chlen;
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/* make sure we have the first byte in the buffer */
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switch (psenc->chlen) {
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case 0:
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if (n < 1)
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goto restart;
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psenc->ch[0] = *s0++;
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psenc->chlen = 1;
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n--;
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break;
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case 1:
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break;
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default:
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/* illegal state */
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goto ilseq;
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}
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c = _citrus_BIG5_check(psenc->ch[0] & 0xff);
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if (c == 0)
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goto ilseq;
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while (psenc->chlen < c) {
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if (n < 1) {
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goto restart;
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}
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psenc->ch[psenc->chlen] = *s0++;
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psenc->chlen++;
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n--;
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}
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switch (c) {
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case 1:
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wchar = psenc->ch[0] & 0xff;
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break;
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case 2:
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if (!_citrus_BIG5_check2(psenc->ch[1] & 0xff))
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goto ilseq;
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wchar = ((psenc->ch[0] & 0xff) << 8) | (psenc->ch[1] & 0xff);
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break;
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default:
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/* illegal state */
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goto ilseq;
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}
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*s = s0;
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psenc->chlen = 0;
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if (pwc)
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*pwc = wchar;
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if (!wchar)
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*nresult = 0;
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else
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*nresult = c - chlenbak;
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return (0);
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ilseq:
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psenc->chlen = 0;
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*nresult = (size_t)-1;
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return (EILSEQ);
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restart:
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*s = s0;
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*nresult = (size_t)-2;
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return (0);
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}
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static int
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/*ARGSUSED*/
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_citrus_BIG5_wcrtomb_priv(_BIG5EncodingInfo * __restrict ei,
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char * __restrict s,
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size_t n, wchar_t wc, _BIG5State * __restrict psenc,
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size_t * __restrict nresult)
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{
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int l;
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_DIAGASSERT(ei != NULL);
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_DIAGASSERT(nresult != 0);
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_DIAGASSERT(s != NULL);
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/* check invalid sequence */
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if (wc & ~0xffff)
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goto ilseq;
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if (wc & 0x8000) {
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if (_citrus_BIG5_check((wc >> 8) & 0xff) != 2 ||
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!_citrus_BIG5_check2(wc & 0xff))
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goto ilseq;
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l = 2;
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} else {
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if (wc & ~0xff || !_citrus_BIG5_check(wc & 0xff))
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goto ilseq;
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l = 1;
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}
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if (n < l) {
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/* bound check failure */
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goto ilseq;
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}
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if (l == 2) {
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s[0] = (wc >> 8) & 0xff;
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s[1] = wc & 0xff;
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} else
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s[0] = wc & 0xff;
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*nresult = l;
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return (0);
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ilseq:
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*nresult = (size_t)-1;
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return (EILSEQ);
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}
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/* ----------------------------------------------------------------------
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* public interface for ctype
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*/
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_CITRUS_CTYPE_DECLS(BIG5);
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_CITRUS_CTYPE_DEF_OPS(BIG5);
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#include "citrus_ctype_template.h"
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